78 Extract from the third fohone of 



Professor Mascagni found it concrete on the borders of 

 the warm spring of Sasso near Sienna, and gave it the name 

 of sassohn. 



A hundred parts of sassolin, dissolved in boihng water 

 and spirit of wine, gave in their analysis 



Boracic acid ----- 86 



Sulphate of magnesia, containing a little iron J 1 

 Sulphate of lime > - - . 3 



100 



Supplement to the Article on Sassolin. 



M. Klaproth joins to this analysis of natural boracic acid 

 that of a gray sandy powder mixed with fragments of mica, 

 ^\'hich are collected in the lagunas, and which was sent to 

 him under the name of loio. 



1st. A small quantity of that powder communicated a 

 slight redness to water coloured by tincture nf turnsole. 



2d. Four ounces of alcohol put to digest over 100 grains 

 of this powder, and filtered, gave no indications of boracic 

 ■acid : on the contraiy, they gave reason to suspect sulphate 

 of lime. 



3d. Water boiled with this powder acquires a taste of 

 s»ulphurated hydrogen, and strongly blackens a silver spoon. 

 It gave, by evaporation, sulphate of lime in fine needles 

 which, joined to that dissolved by the alcohol, weighed 5 

 grains. 



4th. The powder, dried in a gentle heat, weighed 84 

 grains. Being spread out on a small capsule, and gently 

 heated, sulphur was dissipated : it lost eight grains of its 

 ■weight. 



5th. The residuum roasted, with double the quantity of 

 potash, saturated afterwards with muriatic acid, evaporated 

 to dryness, redissolved in water and filtered, gave silex 

 which, when dried, weighed 54. 



6th. The solution well neutralized was precipitated by 

 the succinate of soda ; the roasted precipitate contained 

 three grains of oxide of iron. 



7th. The remaining I'.quor then gave a prer-ipitate by 

 caustic potash, which, added in excess, redissolved it. 

 Being saturated by an acid, and precipitated by carbonate of 

 soda, it deposited alumine which, when calcined, weighed 

 16 grains. 



The 



